1-é so acrescentar o ed no final da palavra
a) developed
b) influenced 
c) believed 
d) discovered
e) created
f) helped
g)invented
h) saved
2- a) saved
b) assisted
c) worked
d) left
e) came back
f) became
g) were
h) embarked

3-a) them
b) you
c) them
d) them
e) me
f) us